Very very unhappy client

I am really disappointed at how my banking notifications were handled by Standard .They are my bank and I trust them to provide me the correct info.I get paid on the 26th the first notifications I receive are for my debit orders and all the debits due on my account were processed immediately my salary cleared in my bank account.When I received all the my debit order notification I then started using my card @16:41 I drew money from my account and the balance showing after that transaction was R3284.38.I then made a purchase of R143.60 which then took my avail balance to R3140.78. This morning I drew R2500 and the balance showing was R25.78 which to me was not correct I should have been left with a balance of R640.I contacted Standard bank immediately on this number *** Tsepiso assisted me.I queried my balance and she took me through my account.The fact that their notifications were incorrect inconveniences me because now they told me I had money on my account that I didn't have .now please tell me how would you feel if you received a notification that you have R500 in your and wake up the next day and its gone.I want my money back please as this was not my fault.